While we're on the subject of weird things found in Mars, how about this photo of a ... bunny on the red planet?

Like a rabbit in a hat, the identity of an oddity that looks like "bunny ears" in a picture from Mars has eluded the science and engineering teams. The public, also fascinated with the mysterious object, has asked in a slew of e-mails: What is it?

It is a yellowish object measuring about 4 to 5 centimeters (about 2 inches) long that made its debut when Opportunity's eyes welcomed Earth to a new neighborhood on Mars in her mission success panoramic image. Meridiani Planum is a landscape unlike any other stop on our decades-long tour of the red planet. Still, it wasn't the conspicuous bedrock outcropping near the horizon that initially fascinated many people. It was the "bunny ears."